A139554 a(n) = lcm(1..floor(n/4)).

1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 6, 6, 6, 6, 12, 12, 12, 12, 60, 60, 60, 60, 60, 60, 60, 60, 420, 420, 420, 420, 840, 840, 840, 840, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 27720, 27720, 27720, 27720, 27720, 27720, 27720, 27720, 360360, 360360

Offset

0,9

Comments

Row products of A139553.

Links

Table of n, a(n) for n=0..53.

Mathematica

Join[{1, 1, 1, 1}, Table[LCM@@Range[Floor[n/4]], {n, 4, 60}]] (* Harvey P. Dale, May 24 2012 *)

Crossrefs

Cf. A139553, A003418.

Sequence in context: A327663 A248782 A038714 * A366746 A230096 A116564

Adjacent sequences: A139551 A139552 A139553 * A139555 A139556 A139557

Keyword

nonn

Author

Mats Granvik, Apr 27 2008

Status

approved